The liberator was a simple single shot pistol made from stamped steel and riveted together like the old fashioned toy guns. It held extra ammo in the grip. The grip also held the stick used to extract the last shell fired.
The gun could be loaded in a lot less time than half an hour!
The firing pin had a grip on it so it could be pulled back to cock it and turned to the side to allow access to the chamber. A steel shutter used as a breech block is pulled up and a round can then be chambered, or extracted using the wooded dowel. Once the round is in, the shutter is slid down and the fireing pin's handle rotated back over the the back of the breech. No rifleing in the barrel, no sights to speak of. It was meant for close range use, and cheap production and was air dropped in large numbers. The gun also included simple instructions using drawings.